A man has dual personality and incorporates the differences between the cities of Rio de Janeiro and São Paulo: sometimes he is Eduardo, the correct and timid guy from São Paulo (paulistano) and sometimes he is Duca, the boaster and cheeky guy from Rio (carioca). He gets himself involved in a big love affair mess when, despite being in a long-term relationship with his fiancée, his alter ego fall in love for another woman that he just met.